. A biological survey of Colorado. Natural history Colorado; Mammals Colorado; Trees Colorado. 1911.] MAMMALS. 109 A. ir. IIowoll, of tho I>i()l()<i-ical vSurvcy, who lias in preparation a revision of the genus Reithrodontomys, lias coin[)are(l with related forms the toi)otype series of R. montanus from Medano Sj)rings ranch. The following cluiraeterization is from his manuscript: ^'(reneral characters,—Size small (about the size of hurailis); ears and tail short; colors ])ale. "(hlor.— (Fresh winter pelage, October and November). Pinkish butr, clearest on sides and face, much mixed
. A biological survey of Colorado. Natural history Colorado; Mammals Colorado; Trees Colorado. 1911.] MAMMALS. 109 A. ir. IIowoll, of tho I>i()l()<i-ical vSurvcy, who lias in preparation a revision of the genus Reithrodontomys, lias coin[)are(l with related forms the toi)otype series of R. montanus from Medano Sj)rings ranch. The following cluiraeterization is from his manuscript: ^'(reneral characters,—Size small (about the size of hurailis); ears and tail short; colors ])ale. "(hlor.— (Fresh winter pelage, October and November). Pinkish butr, clearest on sides and face, much mixed with blackish on dorsal surface. Black hairs, most pronounced on hinder back. Ears much as in megalotis, usuall}^ clothed on iimer surface with ochraceous buff hairs (a little darker than body hairs), sometimes, though not. Tig. 12.—Distribution in Colorado of harvest mice {Reithrodontomys) except E. albescens. always, with a distinct blackish area on lower margin. Tail dis- tinctly bicolor—grayish brown above, white beneath. Compared with megalotis, the general tone is paler and less bro^vnish; dorsal area more distmct from color of sides; sides pinkish buff instead of ochraceous buff; tail grayer (less brownish). ^'Cranial cliaracters.—Skull about the same size as that of humilis, but mth narrower rostrum and interorbital region; zygomata nar- rowing anteriorly; nasals longer; molars heavier. Compared with megalotis the resemblance is very close; montanus averages smaller, with narrower and relatively higher brain case. " Measurements.—Average ol 10 specimens from Medano Springs ranch: Total length, 126 (118-139); tail vertebrae, 58 (51-64);. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Cary, Merritt, 1880-1918; United States. Bureau of Biological Survey. Washington : Government Printi
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